Question

Here are the shadows of some 3-D objects, when seen under the lamp of an overhead projector. Identify the solid(s) that match each shadow. (There may be multiple answers for these!)

Answer 1

The given shadows can be obtained in case of the following objects.

1. Compact disk 
2. A dice 
3. Triangular pyramid 
4.  Note Book

Answer 2

The given shadows can be obtained in the case of the following objects.
(i) When you shine a light on a ball or a round object, the shadow it makes looks like a circle.
(ii) If you shine a light on a cube, like a dice, the shadow it makes looks like a square.
(iii) If you shine a light on an ice cream cone or a birthday hat, the shadow it makes looks like a triangle.
(iv) When you shine a light on a book or something shaped like a rectangular box, the shadow it makes looks like a rectangle.